Lamprophyre-derived high-K mafic enclaves in Variscan granitoids from the Mecsek Mts. (South Hungary)

Petrochemistry of Variscan granitoids of Central Europe: Correlation of Variscan granitoids of the Tisia and Pelsonia Terranes with granitoids of the Moldanubicum, Western Carpathian and Southern Alps. A review: Part I

“…Two trends can be distinguished a high magnesian alkaline one (Fig. 5f, line 2a) occurring as small intrusions or enclaves (lamprophyre-derived durbachite; Buda and Dobosi 2004b), and a calcalkaline one with lower Mg content and a slight enrichment in Fe, forming the host rock of the previous one (microcline megacryst-bearing granitoid) or microgranite crosscutting both (Fig. 5f, line 2b).…”

“…Approximately one thousand high-quality whole rock chemical analyses of granitoids were collected from the Moldanubian Zone of the Variscan collision belt (Central and South Bohemian Plutons), the West Carpathian Plutons, the Tisia and Pelsonia Terranes and the Southern Alps from references (Hovorka 1972;Vejnar 1972;Bargossi et al 1979;D'Amico 1979;Alberti et al 1983;Jantsky 1957Jantsky , 1979Buda and Dobosi 2004b) and submitted to renewed analysis by atomic absorption and XRF methods. This large number of major element rock analyses was evaluated using petrochemical calculations and statistical methods (see part II).…”

Shoshonites, vaugnerites and potassic lamprophyres: similarities and differences between ‘ultra’-high-K rocks

“…To be included, each analysis had to fulfil the following criteria: (1) the published totals had to be equal to the sum of the reported oxides to exclude typing errors; (2) K 2 O had to be higher than 1·5 wt. Vaugnerites (Supplementary Table 2E): Bowes & Kosler 1993;Buda & Dobosi 2004;Debon et al 1998;Ferre & Leake 2001;Galan et al 1997;Gallastegui 1993;Janousek et al 1995Janousek et al , 2000Klotzli et al 2004;Michon 1987;Rossi & Cocherie 1991;Sabatier 1978Sabatier , 1980Sabatier , 1991Washington 1917;Wenzel et al 2000. % to exclude oddities and highly fractionated specimens.…”

“…Sabatier 1991;Wenzel et al 2000;Buda & Dobosi 2004). Lamprophyres with 87 Sr/ 86 Sr i <0·707 and (Nd) i < 10, characteristic of non-orogenic areas, are likely to represent old-metasome melts with little crustal contamination, as reflected by their mantle-like Th/U ratio, low Cs (<5 ppm) and high Rb/Cs (>40).…”

Tectonostratigraphic terranes and zones juxtaposed along the Mid-Hungarian Line: their contrasting evolution and relationships

“…Darker shade (marked by "a" in the legend) indicates surface outcrops and lighter shade (marked by "b" in the legend) occurrences in the Pre-Neogene basement earlier interpretations they are (I-or S-type) "synorogenic" granitoids (Buda 1996;Klötzli et al 1999). However, according to latest results they were formed by continent-continent collision during the post-closure uplift stage Buda and Dobosi 2004). They are I-type, metaluminous, calc-alkaline, high-K and high-Mg-bearing large intrusion(s), with small lamprophyre-derived, ultrapotassic, Mg-Ca-rich, low Al and Si intrusions and/or enclaves (durbachite).…”